Low-energy planet escape orbit designing method based on invariant manifold and gravity assist

Abstract

The invention relates to low-energy planet escape orbit designing method based on an invariant manifold and a gravity assist, being particularly suitable for the design of a low-energy deep space exploration task orbit by using movable balance points and belonging to the field of an orbital maneuver technology of spacecrafts. The method is carried out by the following steps of: firstly obtaining an orbit state set of the invariant manifold at a periapsis place by introducing a periapsis poincare map based on sectional matching of the periapsis poincare map; and then calculating a maneuver pulse applied to each branch of the invariant manifold in the orbit state set by using a numeric iteration method according to an escape hyperbola excessive speed requirement needed for realizing interplanetary transit, and determining a branch of the invariant manifold corresponding to the escape with minimum fuel and the required maneuver pulse through the comparison of the maneuver pulses. The method disclosed by the invention has the advantages of simple calculation method, high calculation efficiency and the like and can provide reasonable and feasible initial value guess for a precise design.

Description

technical field [0001] The invention relates to a low-energy planetary escape trajectory design method based on invariant manifolds and gravitational assistance, which is particularly suitable for low-energy deep-space exploration mission trajectory design using dynamic balance points, and belongs to the technical field of spacecraft orbital maneuvering. Background technique [0002] The dynamic balance point and the nearby periodic orbit in the three-body dynamic system have important application value in space exploration missions because of their special position and dynamic characteristics. Up to now, many dynamic balance point orbit missions have been successfully implemented in the world, such as ISEE-3, SOHO, Genesis, etc. In recent years, some scholars have proposed the concept of using the dynamic balance point as a deep space exploration relay station, which provides a new transfer method for low-energy deep space exploration. The orbit design from the periodic or...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems that the prior art cannot achieve the most fuel saving, invariant manifold branch selection and maneuvering pulse calculation, etc., the present invention proposes a low-energy planetary escape orbit design method based on invariant manifold and gravitational assistance

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